/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.bpmn.converter.child;

import javax.xml.stream.XMLStreamReader;
import org.activiti.bpmn.constants.BpmnXMLConstants;
import org.activiti.bpmn.converter.util.BpmnXMLUtil;
import org.activiti.bpmn.model.Assignment;
import org.activiti.bpmn.model.DataAssociation;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DataAssociationParser implements BpmnXMLConstants {

    protected static final Logger LOGGER = LoggerFactory.getLogger(DataAssociationParser.class.getName());

    public static void parseDataAssociation(DataAssociation dataAssociation, String elementName, XMLStreamReader xtr) {
        boolean readyWithDataAssociation = false;
        Assignment assignment = null;
        try {
            dataAssociation.setId(xtr.getAttributeValue(null, "id"));

            while (!readyWithDataAssociation && xtr.hasNext()) {
                xtr.next();
                if (xtr.isStartElement() && ELEMENT_SOURCE_REF.equals(xtr.getLocalName())) {
                    String sourceRef = xtr.getElementText();
                    if (StringUtils.isNotEmpty(sourceRef)) {
                        dataAssociation.setSourceRef(sourceRef.trim());
                    }
                } else if (xtr.isStartElement() && ELEMENT_TARGET_REF.equals(xtr.getLocalName())) {
                    String targetRef = xtr.getElementText();
                    if (StringUtils.isNotEmpty(targetRef)) {
                        dataAssociation.setTargetRef(targetRef.trim());
                    }
                } else if (xtr.isStartElement() && ELEMENT_TRANSFORMATION.equals(xtr.getLocalName())) {
                    String transformation = xtr.getElementText();
                    if (StringUtils.isNotEmpty(transformation)) {
                        dataAssociation.setTransformation(transformation.trim());
                    }
                } else if (xtr.isStartElement() && ELEMENT_ASSIGNMENT.equals(xtr.getLocalName())) {
                    assignment = new Assignment();
                    BpmnXMLUtil.addXMLLocation(assignment, xtr);
                } else if (xtr.isStartElement() && ELEMENT_FROM.equals(xtr.getLocalName())) {
                    String from = xtr.getElementText();
                    if (assignment != null && StringUtils.isNotEmpty(from)) {
                        assignment.setFrom(from.trim());
                    }
                } else if (xtr.isStartElement() && ELEMENT_TO.equals(xtr.getLocalName())) {
                    String to = xtr.getElementText();
                    if (assignment != null && StringUtils.isNotEmpty(to)) {
                        assignment.setTo(to.trim());
                    }
                } else if (xtr.isEndElement() && ELEMENT_ASSIGNMENT.equals(xtr.getLocalName())) {
                    if (StringUtils.isNotEmpty(assignment.getFrom()) && StringUtils.isNotEmpty(assignment.getTo())) {
                        dataAssociation.getAssignments().add(assignment);
                    }
                } else if (xtr.isEndElement() && elementName.equals(xtr.getLocalName())) {
                    readyWithDataAssociation = true;
                }
            }
        } catch (Exception e) {
            LOGGER.warn("Error parsing data association child elements", e);
        }
    }
}
